And then for a topper, the 52-year-old -- who was appointed as a sports ambassador for Dubai last summer -- took to the court to hit with countryman Juan Martin del Potro. The 5-foot-5 Maradona first stood on a chair to embrace the 6-foot-6 Del Potro before picking up a racket and challenging the world No. 9 to a few points, even hitting a decent winning volley to the delight of the crowd.